/**
 * Doom-loop detector — TS port of `forge_app::hooks::doom_loop::DoomLoopDetector`.
 *
 * Tracks tool call signatures per opencode session and triggers a reminder
 * when a repeating pattern dominates the tail of the sequence.
 *
 * Detects two shapes of loop (both in `checkRepeatingPattern`):
 *   - [A,A,A,A]          → pattern length 1 repeated threshold times
 *   - [A,B,C,A,B,C,A,B,C]→ pattern length 3 repeated threshold times
 */
export interface ToolSignature {
    name: string;
    argsHash: string;
}
export declare class DoomLoopDetector {
    private readonly threshold;
    private readonly perSession;
    private readonly alreadyWarned;
    constructor(threshold?: number);
    record(sessionId: string, signature: ToolSignature): void;
    reset(sessionId: string): void;
    /**
     * Returns the number of consecutive pattern repetitions at the tail when a
     * loop is detected, otherwise null. Matches the forgecode Rust algorithm.
     */
    detect(sessionId: string): number | null;
    private countRecentRepetitions;
    reminder(count: number): Promise<string>;
    hasWarned(sessionId: string): boolean;
    markWarned(sessionId: string): void;
}
export declare function signatureOf(name: string, args: unknown): ToolSignature;
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